<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./js/bootstrap-4.4.1-dist/css/bootstrap.min.css">
  <script src="./js/vue.js"></script>
  <style>
    .red {
      color: red;
    }
  </style></head>
<body>
    <div id="app">
        <div class="container">
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>
 
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="(item, index) in list" :key="item.id">
                        <td>{{ item.id }}</td>
                        <td>{{ item.name }}</td>
                        <td :class="{ red: item.price > 100 }">{{ item.price }}</td>
                        <td>{{ item.time.toLocaleString()}}</td>
                        <td><a href="#" @click.prevent="remove(index)">删除</a></td>
                    </tr>
                    <tr style="background-color: #EEE">
                        <td>统计:</td>
                        <td colspan="2">总价钱为: {{ totalPrice }}</td>
                        <td colspan="2">平均价: {{ averagePrice }}</td>
                    </tr>
                </tbody>
                <tfoot v-if="list.length === 0">
                    <tr>
                        <td colspan="5" style="text-align: center">暂无数据</td>
                    </tr>
                </tfoot>
            </table>
 
            <form class="form-inline mt-3">
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" v-model="name" class="form-control" placeholder="资产名称" required />
                    </div>
                </div>
                <div class="form-group ml-3">
                    <div class="input-group">
                        <input type="number" v-model.number="price" class="form-control" placeholder="价格" required />
                    </div>
                </div>
                <button class="btn btn-primary ml-3" @click.prevent="addMoney">添加资产</button>
            </form>
        </div>
    </div>
</body>
</html>
<script src="./js//2.7.14_dist_vue.js"></script>
<script>
    const app = new Vue({
      el: '#app',
      data: {
        name: "", // 名称
        price: 0, // 价格
        list: [
          { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
          { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
          { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
          { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
        ],
      },
      methods: {
        addMoney() {
                    if (!this.name || this.price === 0) {
                        alert('数据不能为空');
                        return;
                    }
                    const newItem = {
                        id: this.list.length ? this.list[this.list.length - 1].id + 1 : 100,
                        name: this.name,
                        price: this.price,
                        time: new Date(),
                    };
                    this.list.push(newItem);
                    //添加成功后清空两个输入框
                    this.name = "";
                    this.price = 0;
                },
                remove(index) {
                    this.list.splice(index, 1);
                }
            },
      computed: {
                totalPrice() {
                    return this.list.reduce((sum, item) => sum + item.price, 0).toFixed(2);
                },
                averagePrice() {
                    return (this.list.reduce((sum, item) => sum + item.price, 0) / this.list.length).toFixed(2);
                }
            },
        });
</script>